Concurrent requests: Catching both successful and failed requests

Hi,

Ran into a situation similar to this: http://stackoverflow.com/questions/38262315/axios-concurrent-requests-any-way-to-get-the-results-from-the-successful-reques

I’d want to capture both successful and failed requests. Currently if one of the request fails then (by design I guess) only .catch() evaluates and not the .then().

I should mention I’m using .all() with a varying number of requests in a fashion similar to what was done on this S/O:

let urlArray = [] // unknown # of urls (1 or more)

let promiseArray = urlArray.map(url => axios.get(url)); // or whatever
axios.all(promiseArray)
.then(function(results) {
  let temp = results.map(r => r.data);
  …
});

Has anyone successfully done this?

[rubennorte]

Axios returns promises so you can apply any promise-related technique that allows that. Maybe there’s an external package for that (Bluebird or standalone) but I’d do something like:

function useNull() {
  return null;
}

axios.all([
      axios.request(options[ 0 ]).catch(useNull),
    , axios.request(options[ 1 ]).catch(useNull),
    , axios.request(options[ 2 ]).catch(useNull)
]).then(axios.spread(function (res1, res2, res3) {
    // res1, res2, and res3 contains the response or null if they failed
}));

[vksbansal]

Thanks for your efforts to provide a solution @rubennorte and request you confirm

will the response of the request come on the same position on which the request was placed

e.g.

request 1 2 3

response after axios.spread 1 2 3

Second question

If a request is failing with 404 error code then its not coming in then so not able to get the result of rest requests. Please help.